Ochodaeidae

Ren, Dong, 2010, The oldest fossil Ochodaeidae (Coleoptera: Scarabaeoidea) from the Middle Jurassic of China, Zootaxa 2553, pp. 65-68 : 67

Key to the known Mesozoic species of Ochodaeidae

1. Body small (about 6 mm) ............................................................................................................................................ 2

- Body large (10–12 mm) ................................................................................................................................................ 3

2. Elytron with striae well defined ( Fig. 4) ................................................................... Cretochodaeus striatus Nikolajev

- Elytron without obvious striae ( Fig. 5) ................................................................... Lithochodaeus cretaceus Nikolajev

3. Mesotibiae without transverse carinae along outer edge ( Fig. 3) ....................... Cretochodaeus mongolicus Nikolajev

- Mesotibiae with transverse carinae along outer edge ( Fig. 1–2) ..................... Mesochodaeus daohugouensis sp. nov.